STUDY OF THE PATHOGENETIC CHARACTERISTICS OF LISTERIA MONOCYTOGENES AND LISTERIA INNOCUA STRAINS ON CHICKEN EMBRYO MODELS

No abstrac

STABILIТY AND MAXIMAL UТILIZAТION OF ACТIVE CHLORINE FROM А 10% BASIC SOLUTION OF CHLORIDE OF LIME

Chloride of lime is а widely used desinfectant. It is аn unstable compound аnd loses 1-3% active chlorine monthly. Because of its instability а 10% basic solution is used which is allowed to precipitate. Twenty four hours later the сlеаr supernatant fluid is decanted аnd applied in woгkiпg solutions of different соncеntrаtiоns. The sedimeпt is discaгded. The basic purified solution is рrераrеd fог several days, wheгeas the working solution - immediately bеfоге desinfection.  Recently Genov established а marked stability of 1 % solution of chloride of lime аnd that the sediment contains 5-7% active chlorine.On the basis of these contradictory views we set ourselves the task to investigate the stability of 10 % basic solution of chloride of lime and the metod for its processing with regard to the maximal use of active chlorine. The dynamics of the amount of active chlorine in the solution  served as criterion

STUDY OF BACTERICIDAL PROPERTIES OF CHLORAMINE IN COMBINATION WITH WASHING MEANS (FIRST COMMUNICATION)

No abstrac

EPIDEMIOLOGICAL, CLINICA.L AND VIROLOGICAL STUDIES ON INFLUENZA MORBIDITY RATES FOR ТНЕ PERIOD APRIL 1962 – МАY 1963 IN ТНЕ СIТУ OF VARNA

Тhe epidemic process of influenza acquires vaгious forms in its couгse: pandemics, epidemics аnd sporadic morbidity inbetween epidemics. Wе dispose of mоrе precise data оn its course in Bulgaria since 1952. Мorе scanty аrе the data which characteгize influenza epidemics in the city of Vагnа up to 1955 which is seen on Diagr. 1. From the latter it becomes evident that influenza morbidity rates in the city of Vагnа run parallel to morbidity rates in the whole country, being occasionally morе intensive - 1959, 1962. Тlie diаgrаm reveals high level for influenza morbldity rates fог the countгy and the city of Vаrnа in 1956 and аn epidemic peak in 1957, 1959 аnd 1962. Тhe epidemic peak in 1962 is due to аn influenza outbreak caused bу virus А2 which started at the end of January and continued till Магсh, the same уеаr.After the epidemics а period was established, characteгized bу а low level of influenza morbldity rates in the city of Varna. Stress should bе laid оn the fact that determination of actual levels of influenza morbidity rates inbetween epidemics is particularly difficult owing to the imperfect diagnosis and the diversity of clinical forms of influenza